In scanning near-field optical microscopy (SNOM), the excitation laser light is focused through an aperture with a diameter smaller than the excitation wavelength, resulting in an evanescent ... more

In scanning near-field optical microscopy (SNOM), the excitation laser light is focused through an aperture with a diameter smaller than the excitation wavelength, resulting in an evanescent field (or near-field) on the far side of the aperture.